JPH0453302Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a large tire transport vehicle used for transporting large tires used for aircraft and large vehicles.

Conventional Technology Large tires used on aircraft and large vehicles are quite heavy, so when replacing them, a hand-held lifter as shown in Figure 10 is used to transport the large tires. .

This lifter has front and rear casters 103 and 10.
A roller 1 is mounted on a pair of arms 101, 101 of a planar U-shaped truck frame 100 equipped with a roller 1, respectively.
02, 102 are rotatably supported, and a large tire W is placed astride these rollers 102, 102.

The rear caster 104 has a master cylinder 105 attached to its axle, and the body of the master cylinder 105 is connected to the rear bracket 107 of the bogie frame 100 via a link 106. The upper end is engaged with a support seat 109 on the rear upper side of the truck frame 100.

A plunger pump 111 operated by a lever 110 is attached to the master cylinder 105. By repeatedly operating this lever 110 in the up and down direction, the plunger pump 111 is operated, and the master cylinder 104 is activated. By stretching, the truck frame 100 can be raised to a forward tilted state using the front casters 103 as a fulcrum.
This similar structure is shown in, for example, Japanese Utility Model Application No. 57-174499.

Problems to be Solved by the Invention Large tires W must be transported by hand by a lifter, and the rollers 102, 102
It has been pointed out that loading and unloading of the large tires W onto the top has to be carried out manually, which requires a great deal of labor and time, resulting in poor work efficiency.

Therefore, in order to save labor and improve work efficiency in transporting large tires, loading and unloading large tires, the applicant has previously filed Japanese Patent Application No. 60-193153 (Japanese Unexamined Patent Publication No. 62-56299). We are proposing a self-propelled large tire transport vehicle.

This parallel link mechanism is installed on the rear end of a cart that is self-propelled by an engine or motor and rotates horizontally around a support and swings vertically by a drive mechanism. A hanger arm is horizontally rotatably connected to the swinging end of the hanger arm, and a luggage hanger is suspended from the end of the hanger arm to scoop up a large tire onto a pair of rollers and hold it vertically. It is.

The present invention further improves the large tire transport vehicle proposed in the previous proposal, and folds the parallel link mechanism, hanger arm, and luggage hanger compactly using their connection points as nodes, and when the luggage hanger is loaded on a deck. Furthermore, it is an object of the present invention to provide a large-tire transport vehicle that can suppress the movement of the large-tire vehicle and safely transport the vehicle.

Measures to solve the problem: A deck capable of loading large tires is formed at the rear of a self-propelled cart with a driver's seat on the front side, and a pair of upper and lower columns are rotatably supported on this deck. a parallel link mechanism which pivotally supports a link, and an arm support shaft is connected with a pin between the free ends of these links so as to be swingable horizontally and vertically about the support; and the parallel link mechanism. A drive mechanism is arranged across the support column and the upper link to swing the parallel link mechanism up and down, a hanger arm is connected to the arm support shaft of the parallel link mechanism so as to be rotatable in the horizontal direction, and an inverted U A lower beam is provided across the lower end of the letter-shaped frame, and a pair of holding rollers are disposed on one side of the lower beam to protrude substantially horizontally in parallel, and are detachably suspended from the free end of the hanger arm. , a luggage hanger that holds a large tire vertically over the pair of holding rollers, and a luggage hanger on the upper side of the support of the parallel link mechanism, on the opposite side to the extending direction of the upper and lower links. When the luggage hanger is rotatably supported on the back and is loaded on the deck with its frame approximately parallel to the parallel link mechanism, either one of the locking parts provided on both sides of the tip end of the frame is A bar-shaped stopper is provided that engages with the upper end to prevent the luggage hanger from moving loosely.

Function By rotating the parallel link mechanism and the hanger arm in the horizontal direction, the parallel link mechanism and the hanger arm extend from above the deck of the cart. I lowered it to a nearby location, pushed the luggage hanger towards the large tire that was placed vertically, and
By applying a pair of holding rollers to the circumferential side of a large tire and lifting the luggage hanger, the large tire can be scooped up while straddling the pair of holding rollers.

Therefore, by rotating the hanger arm and the parallel link mechanism horizontally above the deck again, the large tire together with the luggage hanger can be easily loaded onto the deck.

When loading this luggage hanger onto the deck, the parallel link mechanism, hanger arm, and luggage hanger are rotated horizontally using their connection points as nodes. It can be folded compactly, and the luggage hanger can be loaded on a deck with its frame parallel to and close to the parallel link mechanism, but when doing so, the stopper provided on the back of the upper side of the support of the parallel link mechanism must be rotated. By moving one of the locking parts formed on both sides of the tip of the hanger arm and engaging the upper end of the frame of the luggage hanger, horizontal rotation of the hanger arm is prevented and the luggage hanger is prevented from floating. can be suppressed.

When driving the truck to a destination and unloading the large tires, unloading can be easily done by removing the stopper from the top beam of the frame and reversing the above-mentioned operation.

Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figures 1 to 9, 1 is the front wheel, rear wheel 1a,
1b, and is self-propelled by an engine or motor, and has a driver's seat S formed on the front side, and can carry large tires W used for aircraft, etc. behind the driver's seat S. A deck 2 with sufficient space is formed.

In this embodiment, the ground height of the substantially rear half 2a of the deck 2 is lowered, and the deck 2 is formed into a multi-stage shape.
The large tires W are vertically loaded on the truck a along with a luggage hanger to be described later, and the lower side of the large tires W can be prevented from shifting forward by the deck stepped part when the truck is braked.

Reference numeral 3 denotes a parallel link mechanism disposed on the rear end of the rear half 2a of the deck, which includes a support 4 that is rotatable by being supported by a bearing 30 provided at the center of the rear end of the rear half 2a of the deck; It consists of a pair of links 5 and 6 that are pivotally supported at the upper and lower portions, and an arm support shaft 7 that is connected with a pin between the free ends of these links 5 and 6, and is pivoted horizontally and vertically about the support 4. It is swingable.

Reference numeral 8 denotes a drive mechanism for vertically swinging the parallel link mechanism 3, which includes a hydraulic cylinder 9 with a cylinder body 9a pivotally supported at the lower part of the column 4, and a hydraulic cylinder 9 connected at one end to the upper part of the column 4 with a pin, and in the middle part. between a V-shaped arm 10 connected to the operating rod 9b and supported by the hydraulic cylinder 9, and the free end of the arm 10 and the vicinity of the end of the upper link 5 on the side where the arm support shaft 7 is connected. It consists of a strut-type shock absorber 11 connected with a pin to the upper link mechanism 3, and transmits the extension/retraction force of the hydraulic cylinder 9 to the upper link 5 via the arm 10 and the shock absorber 11. swings up and down around support 4.

Reference numeral 12 denotes a hanger arm that is horizontally rotatably mounted on the arm support shaft 7 of the parallel link mechanism 3, and a luggage hanger 13 is rotatably suspended from the free end of the hanger arm.

The luggage hanger 13 is removably suspended from the hanger arm 12 via a hook pin 13a, and is rotatable horizontally about the hook pin 13a. Luggage hanger 13 is an inverted U
It is equipped with a letter-shaped frame 14, a lower beam 15 disposed astride the lower end of the frame 14, and a pair of holding rollers 16 protruding from both ends of the lower beam 15 so as to be rotatable and substantially horizontally parallel to one side. A large, heavy tire W can be scooped up and placed on these holding rollers 17.

Further, a height adjustment mechanism 17 for the luggage hanger 13 is provided at the upper end of the frame 14.

This height adjustment mechanism 17 includes a holding roller 16 mounted on a bracket 14a fixed to the upper end of the frame 14.
A pair of inner cylinders 17a, 17a projecting obliquely upward on the side on which they are protruded, and a top end plate 18 having the hook pin 13a projecting from its upper surface.
A pair of outer cylinders 17b, 17b are provided on the lower surface of the housing to project diagonally downward, and are slidably fitted onto the inner cylinders 17a, 17a, and between each of the inner cylinders 17a and the outer cylinder 17b. The frame 1 is stretched across the frame 1.
4. A balancer spring 17c that bears the load of the lower beam 15 and the holding roller 16, and inner and outer cylinders 17a, 17b and 17a, 17 on both sides thereof.
A screw mechanism 17d is provided between the top end plate 18 and the bracket 14a.

The screw mechanism 17d includes a screw shaft 17e that is rotatably supported by a bracket 14a and has a handle 17f at its lower end, an inner cylinder 17h that has a nut member 17g screwed onto the screw shaft 17e in its tip, and a bracket. an outer cylinder 17i which is fixed to the inner cylinder 17h and which is fixed to the inner cylinder 17h and which includes a screw shaft 17e and is slidably fitted to the inner cylinder 17h;
It is provided with a cylindrical protective cover 17j that covers the fitting portions of the outer cylinders 17h and 17i. This screw mechanism 17d loosely fits the upper end of the inner cylinder 17h into a support shaft 17k protruding from the top end plate 18, and the pin 1
They are swingably connected by 7l.

Thereby, by rotating the handle 17f and moving the nut member 17g along the screw shaft 17e, the inner and outer cylinders 17a and 17b are relatively expanded and contracted, and the large tires W and _W1 are The height of the luggage hanger 13 can be adjusted according to the external dimensions, that is, the height from the lower beam 15 to the top end plate 17 can be adjusted.

Then, on the upper side of the column 4 of the parallel link mechanism 3, with the luggage hanger 13 loaded on the rear half 2a of the deck with the frame 14 close to and parallel to the parallel link mechanism 3, the upper end of the frame 14,
Specifically, a stopper 20 is provided that engages with the bracket 14a to lock the luggage hanger 13.

This stopper 20 is formed in the shape of a flat bar, and has grooves 20a as locking parts on both edges of the tip, and has a rear surface 4a on the opposite side to the direction in which the upper and lower links 5 and 6 of the support column 4 extend. It is rotatably attached to the column with a bolt 21, and when not in use, this column 4
When in use, the groove 20 is rotated clockwise or counterclockwise as shown in the second figure.
A can be engaged with the bracket 14a to lock the luggage hanger 13.

In the figure, 19 is a holder provided on the lower surface side of the top end plate 18 of the luggage hanger 13 to prevent the large tire W placed on the holding rollers 17, 17 from falling, and 22 is a holder on both sides of the trolley 1. With the tray-shaped tire holding plates attached to the parts, large tires W can also be placed and held vertically on these tire holding plates 22. A pair of outriggers 31 are provided on each side of the truck 1 and are grounded during cargo handling operations.

According to the above embodiment structure, the luggage hanger 13
The large tires W held on the platform are transported by running the trolley 1 to the destination, and are lowered from the rear half 2 of the deck.
For example, when installing it on the axle of an aircraft not shown,
When the hydraulic cylinder 9 is slightly extended, the driving force is transmitted from the upper link 5 to the lower link 6 via the arm support shaft 7, causing the upper and lower links 5 and 6 to swing upward at the same time. 7 is moved vertically upward parallel to the support column 4.

As a result, the luggage hanger 13 suspended by the hanger arm 12 is lifted from above the rear half 2a of the deck together with the large tires W, so the parallel link mechanism 3
If the hanger arm 12 is rotated in the horizontal direction by manual operation around the support column 4, and the hanger arm 12 is similarly rotated in the horizontal direction around the arm support shaft 7, the luggage hanger 13 can be rotated, for example, as shown in the sixth and seventh figures. can be moved to a predetermined position behind the deck 2.

Therefore, the parallel link mechanism 3 and the hanger arm 12 can be rotated in the horizontal direction, and the luggage hanger 1 can be rotated in the horizontal direction.
3, the large tire W is brought to the side of the axle end of the aircraft (not shown), and the hydraulic cylinder 9 is actuated to move the cargo hanger 13 onto the large tire W. By adjusting the center so that it is at the height of the axle end and pushing the luggage hanger 13 together with the large tire W toward the axle end, the large tire W can be placed at the axle end while being suspended. Easy to fit and install.

Next, when removing the old large tire W from the axle, taking it into the luggage hanger 13, and loading it on the rear half 2a of the deck, do the same as described above on the luggage hanger 1.
3 to the side of the large tire W mounted on the axle, push the luggage hanger 13 toward the large tire W, and insert the pair of holding rollers 16, 16 under the large tire W. The luggage hanger 13 is moved slightly upward by the operation of the hydraulic cylinder 9, and these holding rollers 16, 16 are attached to the large tire W.
(See Figures 6 and 7).

Then, by unfastening the large tire W from the axle and moving the large tire W along with the luggage hanger 13 in a direction away from the axle, the large tire W can be scooped onto these holding rollers 16, 16, so that the large tire W can be scooped up onto these holding rollers 16, 16 later. To do this, it is sufficient to reverse the process of installing the large tire W described above, and fold the parallel link mechanism 3, hanger arm 12, and luggage hanger 13 compactly onto the deck 2 using their connection points as nodes.
The luggage hanger 13 is placed in a state substantially parallel to the parallel link mechanism 3, that is, the frame 14 is placed in a state substantially parallel to the parallel link mechanism 3.
(1st, 3rd, 4th)
(see figure).

Similarly, when a large tire W stored vertically on the floor of a hangar or the like is taken into the luggage hanger 13 and loaded onto the rear half 2a of the deck, the luggage hanger 13 is lowered to near the floor. Similarly to the above, the large tire W stored vertically is brought to the side and pushed toward the large tire W, and the pair of holding rollers 16, 16 are applied to the circumferential side of the large tire W. If the hanger 13 is moved upward by the operation of the hydraulic cylinder 9, the large tire W can be scooped onto these holding rollers 16, 16. By the horizontal rotation operation and the vertical swing of the parallel link mechanism 3 by the hydraulic cylinder 9, the large tire W can be loaded together with the cargo hanger 13 onto the rear half 2a of the deck.

On the other hand, the luggage hanger 13 is placed on the rear half 2a of the deck.
When the large tires W held and loaded are lowered onto the floor of a hangar or the like and stored vertically, the above-described tire loading operation may be reversed.

Furthermore, loading and unloading of large tires W onto the tire holding plates 22 protruding from both sides of the truck 1 can be easily carried out using exactly the same procedure as loading and unloading onto the rear half 2a of the deck described above. It can be carried out.

Here, as mentioned above, the luggage hanger 13 is folded compactly onto the rear half part 2a of the deck by rotating horizontally using the connecting points of the parallel link mechanism 3, hanger arm 12, and luggage hanger 13 as nodes. However, in this state, the hanger arm 12 will rotate horizontally around the connection point with the arm support shaft 7 due to vibrations during traveling, and the luggage hanger 13 will move onto the rear half 2a of the deck. There is a risk of it moving back and forth.

Therefore, by rotating the stopper 20 on the back surface 4a of the column 4, one of the grooves 20a, 20a can be connected to the bracket 14 on the upper end of the frame 14 of the luggage hanger 13.
When engaged with a, the horizontal rotation of the hanger arm 12 is prevented, and the back and forth movement of the luggage hanger 13 is reliably suppressed, allowing safe transportation.

The folding mode of the luggage hanger 13, hanger arm 12, and parallel link mechanism 3 when loading the luggage hanger 13 onto the rear half 2a of the deck is as follows:
As shown in FIG. 3 or 4 depending on the cargo handling location, the rear half 2a of the deck is folded from either the left or right side, but in either case, the stopper 20
If the direction of rotation is reversed as shown in FIG.
4a.

When not in use, this stopper 20 can be rotated downward by its own weight or manually.
It can be located within the back surface 4a of the support column 4,
The parallel link mechanism 3 does not remain protruding to the side, and therefore does not cause any trouble during cargo handling operations.

Effects of the invention As described above, according to the invention, it is possible to easily transport heavy large tires to the destination by running a self-propelled trolley, and it is also possible to load and unload large tires in parallel. link mechanism,
Large tires can be easily loaded and unloaded by a single worker by manually rotating the hanger arm and luggage hanger in the horizontal direction and by vertically swinging the parallel link mechanism by operating the drive mechanism. This makes it possible to save labor and speed up the work.

In particular, the parallel link mechanism rotates horizontally around the support, and the hanger arm rotates horizontally about the arm support axis of this parallel link mechanism, so the horizontal rotation of the parallel link mechanism and hanger arm moves the cart. The cargo hanger can be freely extended to the designated loading or unloading position for large tires, such as on the left and right sides of the deck, or in the front and rear directions, without any adjustment, making cargo handling operations even easier. be able to.

In addition, a bar-shaped stopper with locking parts on both sides of the tip is rotatably provided on the back of the upper side of the pillar of the parallel link mechanism, and the frame is connected to the parallel link mechanism when the luggage hanger is placed on the deck. The luggage hanger can be fixed by engaging the locking part of the stopper with the upper end of the frame in a state where the luggage hanger is loaded almost parallel to the frame. It can be transported safely without any damage.

Moreover, when the luggage hanger is loaded onto the deck, even if the folding direction with respect to the connection points of the parallel link mechanism, hanger arm, and luggage hanger is from either the left or right side of the deck, the tip of the stopper Since locking portions are provided on both side edges, either one of these locking portions can be engaged with the frame by reversing the direction of rotation of the stopper, and the folding direction is not restricted. .

Furthermore, since the stopper is formed into a bar shape and can be positioned inside the back of the column when not in use, the stopper does not remain protruding to the side of the parallel link mechanism, making it easier to handle cargo. It does not interfere with work in the slightest.

[Brief explanation of the drawing]

Figure 1 is a rear perspective view of one embodiment of the present invention;
The figure is a schematic explanatory diagram showing the operating mode of the stopper, FIG. 3 is a schematic plan view of the rear part of the vehicle of the same embodiment, and
The figure is an overall schematic plan view of the same embodiment, FIG. 5 is a side view of the same, FIG. 6 is a schematic plan view when loading or unloading large tires, and FIG. 7 is a side view of the same. 8 is a cross-sectional explanatory view of the height adjustment mechanism, FIG. 9 is a side view of the luggage hanger, and FIG. 10 is a perspective view of a conventional lifter. 1... Trolley, 2... Deck, 3... Parallel link mechanism, 4... Support, 4a... Back of support, 5...
Upper link, 6... Lower link, 7... Arm support shaft, 8... Drive mechanism, 12... Hanger arm, 13... Luggage hanger, 14... Frame,
15... Lower beam, 16... Holding roller, 20
...stopper, 20a...locking part, W...large tire.

Claims (1)

[Scope of utility model registration request] A deck capable of loading large tires is formed at the rear of a self-propelled trolley that has a driver's seat on the front side, and a pair of links are pivotally supported at the top and bottom of a column rotatably supported on this deck. A parallel link mechanism in which an arm support shaft is connected with a pin between the free ends of these links so that it can swing freely in the horizontal and vertical directions around the column, and the column and upper link of the parallel link mechanism. A drive mechanism that swings the parallel link mechanism up and down, a hanger arm that is horizontally rotatable and connected to the arm support shaft of the parallel link mechanism, and a lower beam at the lower end of the inverted U-shaped frame. A pair of holding rollers are disposed astride the lower beam, and a pair of holding rollers are disposed to protrude substantially horizontally in parallel to one side of the lower beam. It is equipped with a luggage hanger that straddles and holds a large tire vertically, and on the upper side of the column of the parallel link mechanism, there is also a rotatable pivot support on the back side opposite to the extending direction of the lower link. Then, with the luggage hanger loaded on the deck with its frame substantially parallel to the parallel link mechanism, either one of the locking parts provided on both side edges of the tip part is engaged with the upper end of the frame, A large tire transport vehicle characterized by a bar-shaped stopper that suppresses the movement of luggage hangers.